22,2 Shaw: Merrillosphaera africana 191 



part of the daughter may be a vestigial mate of the larger 

 one, and the two near the middle may be a vestigial second 

 equatorial pair of gonidia. 



Specimen -4. — Plate 1, fig. 4. This is an asexual coenobium 

 with a pair of daughters, each containing two pairs of gonidia. 

 It was in a preparation that dried before being closely studied. 



Specimen 5. — Plate 1, fig. 5. This is another asexual coeno- 

 bium with two daughters. The one at the left contains two 

 pairs of gonidia, and the one at the right contains a pair of 

 larger gonidia and a single smaller one. The specimen was 

 ruined by a bubble before being examined for abortive repro- 

 ductive bodies. 



Specimen 6.— Plate 1, fig. 6. This is an asexual coenobium 

 with a pair of larger daughters and a single smaller one. The 

 mother contains also, on the farther side and partly hidden by 

 the smaller daughter, a reproductive body about 18 /x wide that 

 appears to be divided into four cells. It is in the position 

 that would have been occupied by the mate of the smaller 

 daughter had there been one developed. In the right daughter 

 there are two and in the lower daughter there is one of the 

 abortive reproductive bodies in addition to the large ones that 

 appear in the picture. 



Specimen 7.— Plate 2, fig. 7. This is an asexual coenobium 

 containing a bisexual, a male, and an asexual daughter. The 

 bulging of the sides of the mother is partly due to flattening 

 under the cover glass. The asexual daughter contains three 

 prominent gonidia, two of 55 n and one of 35 /*. Damage by 

 the crowding of a bubble has made it impossible to look for a 

 vestigial mate of this smaller daughter. The asexual daughter 

 is headed backward and the others are headed forward, and 

 all show absence of reproductive bodies in their anterior ends. 

 The sexual daughters will be described under another heading. 



Specimen 8.— Plate 2, fig. 9. 4 This is an asexual coenobium 

 with two daughters, one sexual and the other asexual. The 

 mother has, on the nearer and the farther sides on a level with 

 the lower ends of the daughters and in the median plane of 



4 The unfortunate arrangement of the figures 



that illustrate this ] 



different order from that in which the specimens; 

 paper resulted partly from a decision 1 

 one hundred diameters, partly from a 

 area. After the plates had 



uniform magnification of 

 -time effort to economize plate 

 there accumulated notes that 

 refer to the figures" by number and render it undesirable to alter their 

 arrangement. 



